CVE-2026-56394

Craft CMS - Authenticated Path Traversal in assets/icon Extension Parameter

State: Published
Severity: 7.1 High
Published: Jun 21, 2026
Updated: Jun 23, 2026
Reserved: Jun 21, 2026

Description

Craft CMS from 4.0.0-RC1 contains an authenticated path traversal vulnerability in the assets/icon endpoint where the extension parameter is not validated before file existence checks. Attackers can bypass extension validation by passing traversal sequences that resolve to existing SVG files, allowing local file read access.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	VulnCheck
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	VulnCheck

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
cmscraftcms	4.0.0-RC1 to before 4.17.7Affected 4.17.7Not affected 5.0.0-RC1 to before 5.9.13Affected 5.9.13Not affected

References

GHSA Advisory GHSA-c43v-4cr8-6mvpvendor-advisory
https://github.com/craftcms/cms/commit/30f5f1a8d6edf0f3a00be72c42c78d9dc7d72d5cpatch
VulnCheck Advisory: Craft CMS - Authenticated Path Traversal in assets/icon Extension Parameterthird-party-advisory

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